mbIntxCheck.cpp

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/*
 * Usage: MOAB intersection check tool, for intersection on a sphere or in plane
 *
 * mpiexec -np n ./mbintx_check -s <source mesh> -t <target mesh> -i <intx mesh>  -o <source verif>
 * -q <target verif>
 *
 * after a run with mbtempest in parallel, that computes intersection, we can use this tool to
 * verify areas of intersection polygons, compared to areas of source, target elements
 *
 */

#include <iostream>
#include <cstdlib>
#include <vector>
#include <string>
#include <sstream>
#include <cassert>

#include "moab/Core.hpp"
#include "moab/IntxMesh/IntxUtils.hpp"
#include "moab/ProgOptions.hpp"
#include "moab/CpuTimer.hpp"
#include "DebugOutput.hpp"

#ifdef MOAB_HAVE_MPI
// MPI includes
#include "moab_mpi.h"
#include "moab/ParallelComm.hpp"
#include "MBParallelConventions.h"
#endif

using namespace moab;

int main( int argc, char* argv[] )
{
    std::stringstream sstr;
    // Default area_method = lHuiller; Options: Girard, GaussQuadrature (if TR is available)
    const IntxAreaUtils::AreaMethod areaMethod = IntxAreaUtils::lHuiller;

    int rank = 0, size = 1;
#ifdef MOAB_HAVE_MPI
    MPI_Init( &argc, &argv );
    MPI_Comm_rank( MPI_COMM_WORLD, &rank );
    MPI_Comm_size( MPI_COMM_WORLD, &size );
#endif

    std::string sourceFile, targetFile, intxFile;
    std::string source_verif( "outS.h5m" ), target_verif( "outt.h5m" );
    int sphere           = 1;
    int oldNamesParents  = 1;
    double areaErrSource = -1;
    double areaErrTarget = -1;
    ProgOptions opts;

    opts.addOpt< std::string >( "source,s", "source file ", &sourceFile );
    opts.addOpt< std::string >( "target,t", "target file ", &targetFile );
    opts.addOpt< std::string >( "intersection,i", "intersection file ", &intxFile );
    opts.addOpt< std::string >( "verif_source,v", "output source verification ", &source_verif );
    opts.addOpt< std::string >( "verif_target,w", "output target verification ", &target_verif );
    opts.addOpt< double >( "threshold_source,m", "error source threshold ", &areaErrSource );
    opts.addOpt< double >( "threshold_target,q", "error target threshold ", &areaErrTarget );

    opts.addOpt< int >( "sphere,p", "mesh on a sphere", &sphere );
    opts.addOpt< int >( "old_convention,n", "old names for parent tags", &oldNamesParents );

    opts.parseCommandLine( argc, argv );
    // load meshes in parallel if needed
    std::string opts_read = ( size == 1 ? ""
                                        : std::string( "PARALLEL=READ_PART;PARTITION=PARALLEL_PARTITION" ) +
                                              std::string( ";PARALLEL_RESOLVE_SHARED_ENTS" ) );

    // read meshes in 3 file sets
    ErrorCode rval;
    Core moab;
    Interface* mb = &moab;  // global
    EntityHandle sset, tset, ixset;

    // create meshsets and load files
    rval = mb->create_meshset( MESHSET_SET, sset );MB_CHK_ERR( rval );
    rval = mb->create_meshset( MESHSET_SET, tset );MB_CHK_ERR( rval );
    rval = mb->create_meshset( MESHSET_SET, ixset );MB_CHK_ERR( rval );
    if( 0 == rank ) std::cout << "Loading source file " << sourceFile << "\n";
    rval = mb->load_file( sourceFile.c_str(), &sset, opts_read.c_str() );MB_CHK_SET_ERR( rval, "failed reading source file" );
    if( 0 == rank ) std::cout << "Loading target file " << targetFile << "\n";
    rval = mb->load_file( targetFile.c_str(), &tset, opts_read.c_str() );MB_CHK_SET_ERR( rval, "failed reading target file" );

    if( 0 == rank ) std::cout << "Loading intersection file " << intxFile << "\n";
    rval = mb->load_file( intxFile.c_str(), &ixset, opts_read.c_str() );MB_CHK_SET_ERR( rval, "failed reading intersection file" );
    double R = 1.;
    if( sphere )
    {
        // fix radius of both meshes, to be consistent with radius 1
        rval = moab::IntxUtils::ScaleToRadius( mb, sset, R );MB_CHK_ERR( rval );
        rval = moab::IntxUtils::ScaleToRadius( mb, tset, R );MB_CHK_ERR( rval );
    }
    Range intxCells;
    rval = mb->get_entities_by_dimension( ixset, 2, intxCells );MB_CHK_ERR( rval );

    Range sourceCells;
    rval = mb->get_entities_by_dimension( sset, 2, sourceCells );MB_CHK_ERR( rval );

    Range targetCells;
    rval = mb->get_entities_by_dimension( tset, 2, targetCells );MB_CHK_ERR( rval );

    Tag sourceParentTag;
    Tag targetParentTag;
    if( oldNamesParents )
    {
        rval = mb->tag_get_handle( "RedParent", targetParentTag );MB_CHK_SET_ERR( rval, "can't find target parent tag" );
        rval = mb->tag_get_handle( "BlueParent", sourceParentTag );MB_CHK_SET_ERR( rval, "can't find source parent tag" );
    }
    else
    {
        rval = mb->tag_get_handle( "TargetParent", targetParentTag );MB_CHK_SET_ERR( rval, "can't find target parent tag" );
        rval = mb->tag_get_handle( "SourceParent", sourceParentTag );MB_CHK_SET_ERR( rval, "can't find source parent tag" );
    }

    // error sets, for better visualization
    EntityHandle errorSourceSet;
    rval = mb->create_meshset( MESHSET_SET, errorSourceSet );MB_CHK_ERR( rval );
    EntityHandle errorTargetSet;
    rval = mb->create_meshset( MESHSET_SET, errorTargetSet );MB_CHK_ERR( rval );

    std::map< int, double > sourceAreas;
    std::map< int, double > targetAreas;

    std::map< int, double > sourceAreasIntx;
    std::map< int, double > targetAreasIntx;

    std::map< int, int > sourceNbIntx;
    std::map< int, int > targetNbIntx;

    std::map< int, EntityHandle > sourceMap;
    std::map< int, EntityHandle > targetMap;

    Tag gidTag = mb->globalId_tag();

    Tag areaTag;
    rval = mb->tag_get_handle( "OrigArea", 1, MB_TYPE_DOUBLE, areaTag, MB_TAG_DENSE | MB_TAG_CREAT );MB_CHK_ERR( rval );

    moab::IntxAreaUtils areaAdaptor( areaMethod );
    Range non_convex_intx_cells;
    for( Range::iterator eit = sourceCells.begin(); eit != sourceCells.end(); ++eit )
    {
        EntityHandle cell = *eit;
        const EntityHandle* verts;
        int num_nodes;
        rval = mb->get_connectivity( cell, verts, num_nodes );MB_CHK_ERR( rval );
        if( MB_SUCCESS != rval ) return -1;
        std::vector< double > coords( 3 * num_nodes );
        // get coordinates
        rval = mb->get_coords( verts, num_nodes, &coords[0] );
        if( MB_SUCCESS != rval ) return -1;
        double area = areaAdaptor.area_spherical_polygon( &coords[0], num_nodes, R );
        int sourceID;
        rval = mb->tag_get_data( gidTag, &cell, 1, &sourceID );MB_CHK_ERR( rval );
        sourceAreas[sourceID] = area;
        rval                  = mb->tag_set_data( areaTag, &cell, 1, &area );MB_CHK_ERR( rval );
        sourceMap[sourceID] = cell;
    }
    for( Range::iterator eit = targetCells.begin(); eit != targetCells.end(); ++eit )
    {
        EntityHandle cell = *eit;
        const EntityHandle* verts;
        int num_nodes;
        rval = mb->get_connectivity( cell, verts, num_nodes );MB_CHK_ERR( rval );
        if( MB_SUCCESS != rval ) return -1;
        std::vector< double > coords( 3 * num_nodes );
        // get coordinates
        rval = mb->get_coords( verts, num_nodes, &coords[0] );
        if( MB_SUCCESS != rval ) return -1;
        double area = areaAdaptor.area_spherical_polygon( &coords[0], num_nodes, R );
        int targetID;
        rval = mb->tag_get_data( gidTag, &cell, 1, &targetID );MB_CHK_ERR( rval );
        targetAreas[targetID] = area;
        rval                  = mb->tag_set_data( areaTag, &cell, 1, &area );MB_CHK_ERR( rval );
        targetMap[targetID] = cell;
    }

    for( Range::iterator eit = intxCells.begin(); eit != intxCells.end(); ++eit )
    {
        EntityHandle cell = *eit;
        const EntityHandle* verts;
        int num_nodes;
        rval = mb->get_connectivity( cell, verts, num_nodes );MB_CHK_ERR( rval );
        if( MB_SUCCESS != rval ) return -1;
        std::vector< double > coords( 3 * num_nodes );
        // get coordinates
        rval = mb->get_coords( verts, num_nodes, &coords[0] );
        if( MB_SUCCESS != rval ) return -1;
        int check_sign   = 1;
        double intx_area = areaAdaptor.area_spherical_polygon( &coords[0], num_nodes, R, &check_sign );

        rval = mb->tag_set_data( areaTag, &cell, 1, &intx_area );
        ;MB_CHK_ERR( rval );
        int sourceID, targetID;
        rval = mb->tag_get_data( sourceParentTag, &cell, 1, &sourceID );MB_CHK_ERR( rval );
        rval = mb->tag_get_data( targetParentTag, &cell, 1, &targetID );MB_CHK_ERR( rval );

        std::map< int, double >::iterator sit = sourceAreasIntx.find( sourceID );
        if( sit == sourceAreasIntx.end() )
        {
            sourceAreasIntx[sourceID] = intx_area;
            sourceNbIntx[sourceID]    = 1;
        }
        else
        {
            sourceAreasIntx[sourceID] += intx_area;
            sourceNbIntx[sourceID]++;
        }

        std::map< int, double >::iterator tit = targetAreasIntx.find( targetID );
        if( tit == targetAreasIntx.end() )
        {
            targetAreasIntx[targetID] = intx_area;
            targetNbIntx[targetID]    = 1;
        }
        else
        {
            targetAreasIntx[targetID] += intx_area;
            targetNbIntx[targetID]++;
        }
        if( intx_area < 0 )
        {
            std::cout << "negative intx area: " << intx_area << " n:" << num_nodes << " parents: " << sourceID << " "
                      << targetID << "\n";
        }
        if( check_sign < 0 )
        {
            non_convex_intx_cells.insert( cell );
            std::cout << " non-convex polygon: " << intx_area << " n:" << num_nodes << " parents: " << sourceID << " "
                      << targetID << "\n";
        }
    }
    Tag diffTag;
    rval = mb->tag_get_handle( "AreaDiff", 1, MB_TYPE_DOUBLE, diffTag, MB_TAG_DENSE | MB_TAG_CREAT );MB_CHK_ERR( rval );

    Tag countIntxCellsTag;
    rval = mb->tag_get_handle( "CountIntx", 1, MB_TYPE_INTEGER, countIntxCellsTag, MB_TAG_DENSE | MB_TAG_CREAT );MB_CHK_ERR( rval );

    for( Range::iterator eit = sourceCells.begin(); eit != sourceCells.end(); ++eit )
    {
        EntityHandle cell = *eit;

        int sourceID;
        rval = mb->tag_get_data( gidTag, &cell, 1, &sourceID );MB_CHK_ERR( rval );
        double areaDiff                       = sourceAreas[sourceID];
        std::map< int, double >::iterator sit = sourceAreasIntx.find( sourceID );
        int countIntxCells                    = 0;
        if( sit != sourceAreasIntx.end() )
        {
            areaDiff -= sourceAreasIntx[sourceID];
            countIntxCells = sourceNbIntx[sourceID];
        }
        rval = mb->tag_set_data( diffTag, &cell, 1, &areaDiff );
        rval = mb->tag_set_data( countIntxCellsTag, &cell, 1, &countIntxCells );
        // add to errorSourceSet set if needed
        if( ( areaErrSource > 0 ) && ( fabs( areaDiff ) > areaErrSource ) )
        {
            rval = mb->add_entities( errorSourceSet, &cell, 1 );MB_CHK_ERR( rval );
        }
    }
    if( 0 == rank ) std::cout << "write source verification file " << source_verif << "\n";
    rval = mb->write_file( source_verif.c_str(), 0, 0, &sset, 1 );MB_CHK_ERR( rval );
    if( areaErrSource > 0 )
    {
        Range sourceErrorCells;
        rval = mb->get_entities_by_handle( errorSourceSet, sourceErrorCells );MB_CHK_ERR( rval );
        EntityHandle errorSourceIntxSet;
        rval = mb->create_meshset( MESHSET_SET, errorSourceIntxSet );MB_CHK_ERR( rval );
        if( !sourceErrorCells.empty() )
        {
            // add the intx cells that have these as source parent
            std::vector< int > sourceIDs;
            sourceIDs.resize( sourceErrorCells.size() );
            rval = mb->tag_get_data( gidTag, sourceErrorCells, &sourceIDs[0] );MB_CHK_SET_ERR( rval, "can't get source IDs" );
            std::sort( sourceIDs.begin(), sourceIDs.end() );
            for( Range::iterator eit = intxCells.begin(); eit != intxCells.end(); ++eit )
            {
                EntityHandle cell = *eit;
                int sourceID;
                rval = mb->tag_get_data( sourceParentTag, &cell, 1, &sourceID );MB_CHK_ERR( rval );
                std::vector< int >::iterator j = std::lower_bound( sourceIDs.begin(), sourceIDs.end(), sourceID );
                if( ( j != sourceIDs.end() ) && ( *j == sourceID ) )
                {
                    rval = mb->add_entities( errorSourceIntxSet, &cell, 1 );
                    ;MB_CHK_ERR( rval );
                }
            }
            std::string filtersource     = std::string( "filt_" ) + source_verif;
            rval                         = mb->write_file( filtersource.c_str(), 0, 0, &errorSourceSet, 1 );
            std::string filterIntxsource = std::string( "filtIntx_" ) + source_verif;
            rval                         = mb->write_file( filterIntxsource.c_str(), 0, 0, &errorSourceIntxSet, 1 );
        }
    }

    for( Range::iterator eit = targetCells.begin(); eit != targetCells.end(); ++eit )
    {
        EntityHandle cell = *eit;

        int targetID;
        rval = mb->tag_get_data( gidTag, &cell, 1, &targetID );MB_CHK_ERR( rval );
        double areaDiff                       = targetAreas[targetID];
        int countIntxCells                    = 0;
        std::map< int, double >::iterator sit = targetAreasIntx.find( targetID );
        if( sit != targetAreasIntx.end() )
        {
            areaDiff -= targetAreasIntx[targetID];
            countIntxCells = targetNbIntx[targetID];
        }

        rval = mb->tag_set_data( diffTag, &cell, 1, &areaDiff );
        rval = mb->tag_set_data( countIntxCellsTag, &cell, 1, &countIntxCells );
        // add to errorTargetSet set if needed
        if( ( areaErrTarget > 0 ) && ( fabs( areaDiff ) > areaErrTarget ) )
        {
            rval = mb->add_entities( errorTargetSet, &cell, 1 );MB_CHK_ERR( rval );
        }
    }
    if( 0 == rank ) std::cout << "write target verification file " << target_verif << "\n";
    rval = mb->write_file( target_verif.c_str(), 0, 0, &tset, 1 );MB_CHK_ERR( rval );
    if( areaErrTarget > 0 )
    {
        Range targetErrorCells;
        rval = mb->get_entities_by_handle( errorTargetSet, targetErrorCells );MB_CHK_ERR( rval );
        if( !targetErrorCells.empty() )
        {
            EntityHandle errorTargetIntxSet;
            rval = mb->create_meshset( MESHSET_SET, errorTargetIntxSet );MB_CHK_ERR( rval );
            // add the intx cells that have these as target parent
            std::vector< int > targetIDs;
            targetIDs.resize( targetErrorCells.size() );
            rval = mb->tag_get_data( gidTag, targetErrorCells, &targetIDs[0] );MB_CHK_SET_ERR( rval, "can't get target IDs" );
            std::sort( targetIDs.begin(), targetIDs.end() );
            for( Range::iterator eit = intxCells.begin(); eit != intxCells.end(); ++eit )
            {
                EntityHandle cell = *eit;
                int targetID;
                rval = mb->tag_get_data( targetParentTag, &cell, 1, &targetID );MB_CHK_ERR( rval );
                std::vector< int >::iterator j = std::lower_bound( targetIDs.begin(), targetIDs.end(), targetID );
                if( ( j != targetIDs.end() ) && ( *j == targetID ) )
                {
                    rval = mb->add_entities( errorTargetIntxSet, &cell, 1 );
                    ;MB_CHK_ERR( rval );
                }
            }
            std::string filterTarget     = std::string( "filt_" ) + target_verif;
            rval                         = mb->write_file( filterTarget.c_str(), 0, 0, &errorTargetSet, 1 );
            std::string filterIntxtarget = std::string( "filtIntx_" ) + target_verif;
            rval                         = mb->write_file( filterIntxtarget.c_str(), 0, 0, &errorTargetIntxSet, 1 );
        }
    }

    if( !non_convex_intx_cells.empty() )
    {

        sourceCells.clear();
        targetCells.clear();
        for( Range::iterator it = non_convex_intx_cells.begin(); it != non_convex_intx_cells.end(); it++ )
        {
            EntityHandle cellIntx = *it;
            int sourceID, targetID;
            rval = mb->tag_get_data( sourceParentTag, &cellIntx, 1, &sourceID );MB_CHK_ERR( rval );
            rval = mb->tag_get_data( targetParentTag, &cellIntx, 1, &targetID );MB_CHK_ERR( rval );
            sourceCells.insert( sourceMap[sourceID] );
            targetCells.insert( targetMap[targetID] );
        }
        EntityHandle nonConvexSet;
        rval = mb->create_meshset( MESHSET_SET, nonConvexSet );MB_CHK_ERR( rval );
        rval = mb->add_entities( nonConvexSet, non_convex_intx_cells );
        rval = mb->write_file( "nonConvex.h5m", 0, 0, &nonConvexSet, 1 );MB_CHK_ERR( rval );

        EntityHandle sSet;
        rval = mb->create_meshset( MESHSET_SET, sSet );MB_CHK_ERR( rval );
        rval = mb->add_entities( sSet, sourceCells );
        rval = mb->write_file( "nonConvexSource.h5m", 0, 0, &sSet, 1 );MB_CHK_ERR( rval );
        EntityHandle tSet;
        rval = mb->create_meshset( MESHSET_SET, tSet );MB_CHK_ERR( rval );
        rval = mb->add_entities( tSet, targetCells );
        rval = mb->write_file( "nonConvexTarget.h5m", 0, 0, &tSet, 1 );MB_CHK_ERR( rval );
        rval = mb->add_entities( nonConvexSet, sourceCells );
        rval = mb->add_entities( nonConvexSet, targetCells );
        rval = mb->write_file( "nonConvexAll.h5m", 0, 0, &nonConvexSet, 1 );MB_CHK_ERR( rval );
    }
    return 0;
}